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Test Code LAB2277 Glucose, Serum

Notes:

Patient should fast for 12 hours.

Collection:

Specimen: Blood 

Preferred: Lt Green w/ Gel - Li Hep

Acceptable: Serum Separator, Plain Red or Gray Top Tube

Specimen Volume: 5 mL; Minimum 1.0 mL.Fill gray tube to draw line.

 

Pediatric Collection:

One Green, Gold or Plain Red microtainer filled to 600 uL.

Stability:

Blood specimens collected in a Gray Sodium Flouride tube are stable in whole blood state for:

 

Ambient: 24 Hours

Refrigerated (preferred): 72 Hours

 

Specimens collected in a Lithium Heparin Green, Gold Serum Separator or Plain Red should be separated from red cells ASAP to avoid loss of analyte concentration. Once serum/plasma is separated from cells:

 

Ambient: 8 Hours

Refrigerated (preferred): 1 Week

Frozen: 2 Weeks

Turn Around Time (TAT):

STAT: 1 HOUR

Routine: 4 HOURS

Test Availability:

24 hours a day / 7 days a week

Reference Interval:

Age Reference Range
< 1 Month 45.0 - 90.0 mg/dL
> 1 Month 70.0 - 140.0 mg/dL

 

Additional Test Codes

GLU

Performing Laboratory Section

Chemistry / UMC MAIN LABORATORY

Interpretive Data

Any of the following results, confirmed on a subsequent day, can be considered diagnostic for diabetes: 


-Fasting plasma or serum glucose ≥126 mg/dL after an 8-hour fast 
-2-Hour plasma or serum glucose ≥200 mg/ dL during a 75-gram oral glucose tolerance test (OGTT) 
-Random glucose >200 mg/dL, plus typical symptoms 

 

Patients with "impaired" glucose regulation are those whose fasting serum or plasma glucose fall between 101 and 126 mg/dL, or whose 2-hour value on oral glucose tolerance test fall between 140 and 199 mg/dL. These patients have a markedly increased risk of developing type 2 diabetes and should be counseled for lifestyle changes and followed up with more testing. Indications for screening and testing include strong family history, marked obesity, history of babies over 9 pounds, and recurrent skin and genitourinary infections. 

 

Glucose levels of 25 mg/dL or lower in infants younger than 1 week are potentially life threatening, as are glucose levels of 40 mg/dL or lower in infants older than 1 week.